Home / 20,349.40-28,078.02-11,395.48

Finding the Fourth Proportional to 20,349.40, 28,078.02 and 11,395.48

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Solution

The fourth proportional to 20,349.40, 28,078.02 and 11,395.48 is: 15,723.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,349.40 : 28,078.02 = 11,395.48 : x
  2. Step 2: Convert to fraction form
    20,349.40/28,078.02 = 11,395.48/x
  3. Step 3: Cross multiply
    20,349.40x = 28,078.02 × 11,395.48
  4. Step 4: Simplify right side
    20,349.40x = 319,962,515.35
  5. Step 5: Solve for x
    x = 319,962,515.35/20,349.40
  6. Step 6: Final answer
    x = 15,723.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.